Green’s Dictionary of Slang

ming n.2

[ming v.]

(Scot.) a smell, a stench.

[Scot] M. Munro Patter 46: ming To ming is to stink; a ming is a bad smell, Mingin means stinking but can also be used to describe anything bad.
[Scot]I. Welsh Filth 35: I open my overcoat and flap it to see if the ming is as steadily rancid as I imagine it to be.
[UK]J. Fagan Panopticon (2013) 25: There’s a strong whiff of vomit and sweat. Ming-fucking-mong.

In compounds

ming-bag (n.)

an unpleasant individual, lit. one who stinks.

[UK]J. Fagan Panopticon (2013) 123: People go missing every year [...] Like ming-bag Elaine last spring [...] hey never found her body.